General Description
The MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/
MAX6045/MAX6050 precision, low-dropout, micropower
voltage references are available in miniature SOT23-3
surface-mount packages. They feature a proprietary
curvature-correction circuit and laser-trimmed thin-film
resistors that result in a low temperature coefficient of
<15ppm/°C and initial accuracy of better than 0.2%.
These devices are specified over the extended tempera-
ture range.
These series-mode voltage references draw only 27μA
of quiescent supply current and can sink or source up to
500μA of load current. Unlike conventional shunt-mode
(two-terminal) references that waste supply current and
require an external resistor, devices in the MAX6012
family offer a supply current that’s virtually independent
of supply voltage (with only a 0.8μA/V variation with
supply voltage) and do not require an external resistor.
Additionally, these internally compensated devices do
not require an external compensation capacitor and are
stable with up to 2.2nF of load capacitance. Eliminating
the external compensation capacitor saves valuable
board area in space-critical applications. Their low drop-
out voltage and supply-independent, ultra-low supply
current make these devices ideal for battery-operated,
low-voltage systems.
Applications
●Hand-Held Equipment
●Data Acquisition Systems
●Industrial and Process-Control Systems
●Battery-Operated Equipment
●Hard-Disk Drives
Features
●0.2% (max) Initial Accuracy
●15ppm/°C (max) Temperature Coefficient
● 35μA (max) Quiescent Supply Current
● 0.8μA/V Supply Current Variation with VIN
● ±500μA Output Source and Sink Current
● 100mV Dropout at 500μA Load Current
● 0.12μV/μA Load Regulation
● 8μV/V Line Regulation
●Stable with CLOAD = 0 to 2.2nF
Pin Configuration appears at end of data sheet.
19-4777; Rev 3; 4/01
Selector Guide
Typical Operating Circuit
Ordering Information
PART OUTPUT
VOLTAGE (V) INPUT VOLTAGE (V)
MAX6012 1.247 2.5 to 12.6
MAX6021 2.048 2.5 to 12.6
MAX6025 2.500 (VOUT + 200mV) to 12.6
MAX6030 3.000 (VOUT + 200mV) to 12.6
MAX6041 4.096 (VOUT + 200mV) to 12.6
MAX6045 4.500 (VOUT + 200mV) to 12.6
MAX6050 5.000 (VOUT + 200mV) to 12.6
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX6012AEUR-T -40°C to +85°C 3 SOT23-3 FZAP
MAX6012BEUR-T -40°C to +85°C 3 SOT23-3 FZDA
MAX6021AEUR-T -40°C to +85°C 3 SOT23-3 FZAU
MAX6021BEUR-T -40°C to +85°C 3 SOT23-3 FZDF
MAX6025AEUR-T -40°C to +85°C 3 SOT23-3 FZAQ
MAX6025BEUR-T -40°C to +85°C 3 SOT23-3 FZDB
MAX6030AEUR-T -40°C to +85°C 3 SOT23-3 FZDW
MAX6030BEUR-T -40°C to +85°C 3 SOT23-3 FZDX
MAX6041AEUR-T -40°C to +85°C 3 SOT23-3 FZAR
MAX6041BEUR-T -40°C to +85°C 3 SOT23-3 FZDC
MAX6045AEUR-T -40°C to +85°C 3 SOT23-3 FZAS
MAX6045BEUR-T -40°C to +85°C 3 SOT23-3 FZDD
MAX6050AEUR-T -40°C to +85°C 3 SOT23-3 FZAT
MAX6050BEUR-T -40°C to +85°C 3 SOT23-3 FZDE
IN
+SUPPLY INPUT (SEE SELECTOR GUIDE)
OUT REFERENCE
OUT
2.2nF MAX*
*CAPACITORS ARE OPTIONAL
GND
MAX6012
MAX6021
MAX6025
MAX6030
MAX6041
MAX6045
MAX6050
*
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
(Voltages Referenced to GND)
IN ........................................................................ -0.3V to +13.5V
OUT ............................................................-0.3V to (VIN + 0.3V)
Output Short Circuit to GND or IN (VIN < 6V) ...........Continuous
Output Short Circuit to GND or IN (VIN ≥ 6V) ....................... 60s
Continuous Power Dissipation (TA = +70°C)
3-Pin SOT23-3 (derate 4.0mW/°C above +70°C) .......320mW
Operating Temperature Range ........................... -40°C to +85°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics—MAX6012
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6012A 1.243 1.247 1.251 V
-0.32 0.32 %
MAX6012B 1.241 1.247 1.253 V
-0.48 0.48 %
Output Voltage Temperature
Coefcient (Note 2) VOUT
TA = 0°C to +70°C MAX6012A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6012B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN 2.5V ≤ VIN ≤ 12.6V 8 80 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.12 0.50 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.15 0.60
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3) 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 12 μVp-p
f = 10Hz to 10kHz 65 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 86 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 30 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics—MAX6021
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6021A 2.043 2.048 2.053 V
-0.24 0.24 %
MAX6021B 2.040 2.048 2.056 V
-0.39 0.39 %
Output Voltage Temperature
Coefcient (Note 2) VOUT
TA = 0°C to +70°C MAX6021A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6021B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN 2.5V ≤ VIN ≤ 12.6V 10 100 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.12 0.55 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.18 0.70
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3) 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 35 μVp-p
f = 10Hz to 10kHz 105 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 84 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 70 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics—MAX6025
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6025A 2.495 2.500 2.505 V
-0.20 0.20 %
MAX6025B 2.490 2.500 2.510 V
-0.40 0.40 %
Output Voltage Temperature
Coefcient (Note 2) VOUT
TA = 0°C to +70°C MAX6025A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6025B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN (VOUT + 0.2V) ≤ VIN ≤ 12.6V 15 140 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.14 0.60 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.18 0.80
Dropout Voltage
(Note 5)
VIN-
VOUT IOUT = 500μA 100 200 mV
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3)
ΔVOUT/
time 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 50 μVp-p
f = 10Hz to 10kHz 125 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 82 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 85 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics—MAX6030
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6030A 2.994 3.000 3.006 V
-0.20 0.20 %
MAX6030B 2.988 3.000 3.012 V
-0.40 0.40 %
Output Voltage Temperature
Coefcient (Note 2) VOUT
TA = 0°C to +70°C MAX6030A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6030B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN (VOUT + 0.2V) ≤ VIN ≤ 12.6V 20 150 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.14 0.60 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.18 0.80
Dropout Voltage
(Note 5)
VIN-
VOUT IOUT = 500μA 100 200 mV
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3) 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 65 μVp-p
f = 10Hz to 10kHz 150 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 80 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 100 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics—MAX6041
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6041A 4.088 4.096 4.104 V
-0.20 0.20 %
MAX6041B 4.080 4.096 4.112 V
-0.39 0.39 %
Output Voltage Temperature
Coefcient (Note 2) VOUT
TA = 0°C to +70°C MAX6041A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6041B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN (VOUT + 0.2V) ≤ VIN ≤ 12.6V 25 160 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.15 0.70 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.20 0.90
Dropout Voltage
(Note 5)
VIN-
VOUT IOUT = 500μA 100 200 mV
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3)
ΔVOUT/
time 1000hr at TA = +25°C 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 100 μVp-p
f = 10Hz to 10kHz 200 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 77 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 160 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics—MAX6045
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6045A 4.491 4.500 4.509 V
-0.20 0.20 %
MAX6045B 4.482 4.500 4.518 V
-0.40 0.40 %
Output Voltage Temperature
Coefcient (Note 2) VOUT
TA = 0°C to +70°C MAX6045A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6045B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN (VOUT + 0.2V) ≤ VIN ≤ 12.6V 25 160 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.16 0.80 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.22 1.00
Dropout Voltage
(Note 5)
VIN-
VOUT IOUT = 500μA 100 200 mV
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3)
ΔVOUT/
time 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 110 μVp-p
f = 10Hz to 10kHz 215 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 76 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 180 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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Note 1: All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified.
Note 2: Temperature Coefficient is measured by the “box” method, i.e., the maximum ΔVOUT is divided by the maximum Δt.
Note 3:
Temperature Hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMIN to TMAX.
Note 4: Not production tested. Guaranteed by design.
Note 5:
Dropout voltage is the minimum input voltage at which VOUT changes ≤0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6050).
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics—MAX6050
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
Output Voltage VOUT TA = +25°C
MAX6050A 4.990 5.000 5.010 V
-0.20 0.20 %
MAX6050B 4.980 5.000 5.020 V
-0.40 0.40 %
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
TA = 0°C to +70°C MAX6050A 6 15
ppm/°C
TA = -40°C to +85°C 6 20
TA = 0°C to +70°C MAX6050B 6 25
TA = -40°C to +85°C 6 30
Line Regulation ΔVOUT/
ΔVIN (VOUT + 0.2V) ≤ VIN ≤ 12.6V 25 160 μV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 500μA 0.17 0.85 μV/μA
Sinking: -500μA ≤ IOUT ≤ 0 0.24 1.10
Dropout Voltage
(Note 5)
VIN-
VOUT IOUT = 500μA 100 200 mV
OUT Short-Circuit Current ISC
Short to GND 4mA
Short to IN 4
Temperature Hysteresis
(Note 3) 130 ppm
Long-Term Stability ΔVOUT/
time 1000hr at TA = +25°C 50 ppm/
1000h
DYNAMIC
Noise Voltage eOUT
f = 0.1Hz to 10Hz 120 μVp-p
f = 10Hz to 10kHz 240 μVRMS
Ripple Rejection ΔVOUT/
ΔVIN VIN = 5V ±100mV, f = 120Hz 72 dB
Turn-On Settling Time tRTo VOUT = 0.1% of nal value,
COUT = 50pF 220 μs
Capacitive-Load Stability Range COUT Note 4 0 2.2 nF
INPUT
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 27 35 μA
Change in Supply Current IIN/VIN 2.5V ≤ VIN ≤ 12.6V 0.8 2.0 μA/V
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V for MAX6012/21/25/30/41/45, VIN = +5.5V for MAX6050; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 6)
Typical Operating Characteristics
1.2470
1.2480
1.2475
1.2490
1.2485
1.2505
1.2500
1.2495
1.2510
-40 0-20 20 40 60 80 100
MAX6012
OUTPUT VOLTAGE
TEMPERATURE DRIFT
MAX6012-01
TEMPERATURE DRIFT (°C)
V
OUT
(V)
THREE
TYPICAL PARTS
-100
0
200
100
300
400
2 64 8 10 12 14
MAX6012
LINE REGULATION
MAX6012-04
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
TA = -40°C
TA = +25°C
-0.4
-0.2
0
0.2
0.4
-500 -250 0 250-375 -125 125 375 500
MAX6012
LOAD REGULATION
MAX6012-07
LOAD CURRENT (µA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = -40°C
TA = +25°C
4.986
4.990
4.988
4.996
4.994
4.992
5.002
5.000
4.998
5.004
-40 0 20-20 40 60 80 100
MAX6050
OUTPUT VOLTAGE
TEMPERATURE DRIFT
MAX6012-02
TEMPERATURE DRIFT (°C)
V
OUT
(V)
THREE
TYPICAL PARTS
-200
0
400
200
600
800
5 7 9 11 13
MAX6050
LINE REGULATION
MAX6012-05
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
TA = -40°C
TA = +25°C
-0.400
-0.200
0
0.200
0.400
-500 -250 0 250-375 -125 125 375 500
MAX6050
LOAD REGULATION
MAX6012-08
LOAD CURRENT (µA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +85°C
TA = -40°C
TA = +25°C
4.993
4.995
4.994
4.999
4.998
4.997
4.996
5.002
5.001
5.000
5.003
0 300 400 500100 200 600 700 800 900 1000
MAX6050
LONG-TERM DRIFT
MAX6012-03
TIME (h)
OUTPUT VOLTAGE (V)
THREE
TYPICAL PARTS
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 200 400 600 800 1000
MAX6025/MAX6030
DROPOUT VOLTAGE vs.
SOURCE CURRENT
MAX6012-06
SOURCE CURRENT (µA)
DROPOUT VOLTAGE (V)
TA = +85°C
TA = -40°C
TA = +25°C
0
0.10
0.05
0.20
0.15
0.25
0.30
0 400200 600 800 1000
MAX6041/MAX6045/MAX6050
DROPOUT VOLTAGE vs.
SOURCE CURRENT
MAX6012-09
SOURCE CURRENT (µA)
DROPOUT VOLTAGE (V)
TA = +85°C
TA = -40°C
TA = +25°C
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
Maxim Integrated
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(VIN = +5V for MAX6012/21/25/30/41/45, VIN = +5.5V for MAX6050; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 6)
Typical Operating Characteristics (continued)
100 1k 10k 100k 1M 10M
MAX6012
POWER-SUPPLY REJECTION
vs. FREQUENCY
MAX6012-10
FREQUENCY (Hz)
PSR (mV/V)
100
0.01
0.1
1
10
0.01 100 10k10.1 10 1k 100k 1M
MAX6012
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX6012-13
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
0.1
1
10
100
1k
VOUT
10µV/div
1sec/div
MAX6012
0.1Hz TO 10Hz OUTPUT NOISE
MAX6012-16
MAX6050
POWER-SUPPLY REJECTION
vs. FREQUENCY
MAX16012-11
FREQUENCY (Hz)
PSR (mV/V)
100
0.01
0.1
1
10
10 10k 100k 1M100 1k 10M
VCC = 5.5V ±0.25V
0.01 100 10k10.1 10 1k 100k 1M
MAX6050
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX6012-14
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
0.1
1
10
100
1k
VOUT
20µV/div
1sec/div
MAX6050
0.1Hz TO 10Hz OUTPUT NOISE
MAX6012-17
20
26
24
22
28
30
32
34
36
38
40
2 64 8 10 12 14
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX6012-12
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
VALID OVER SPECIFIED
VIN (MIN) TO VIN (MAX)
FOR EACH PART
20
25
30
35
40
SUPPLY CURRENT
vs. TEMPERATURE
MAX6012-15
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
-40 20 40-20 0 60 80 100
VIN = 12.5V
VIN = 7.5V
VIN = 5.5V
VIN = 2.5V (MAX6012/MAX6025 ONLY)
VIN
1V/div
VOUT
1V/div
10µs/div
MAX6012
TURN-ON TRANSIENT
MAX6012-18
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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(VIN = +5V for MAX6012/21/25/30/41/45, VIN = +5.5V for MAX6050; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 6)
Note 6: Many of the Typical Operating Characteristics of the MAX6012 family are
extremely similar. The extremes of these characteristics are found in the
MAX6012 (1.2V output) and the MAX6050 (5.0V output). The Typical
Operating Characteristics of the remainder of the MAX6012 family typically
lie between these two extremes and can be estimated based on their output
voltage.
Typical Operating Characteristics (continued)
IOUT
40µA/div
+25µA
-25µA
VOUT
20mV/div
10µs/div
MAX6012
LOAD-TRANSIENT RESPONSE
MAX6012-19
IOUT = ±25µA, AC-COUPLED
+500µA
-500µA
VOUT
0.2V/div
IOUT
1mA/div
10ms/div
MAX6012
LOAD-TRANSIENT RESPONSE
MAX6012-22
IOUT = ±500µA, AC-COUPLED
VIN
200mV/div
VOUT
100mV/div
2µs/div
VIN = 5.5V ±0.25V, AC-COUPLED
MAX6050
LINE-TRANSIENT RESPONSE
MAX6012-25
IOUT
50µA/div
VOUT
50mV/div
20ms/div
MAX6050
LOAD-TRANSIENT RESPONSE
MAX6012-20
VIN = 5.5V, IOUT = ±25µA, AC-COUPLED
IOUT
500µA/div
VOUT
200mV/div
20µs/div
MAX6050
LOAD-TRANSIENT RESPONSE
MAX6012-23
VIN = 5.5V, IOUT = ±500µA, AC-COUPLED
VIN
2V/div
VOUT
2V/div
10µs/div
MAX6050
TURN-ON TRANSIENT
MAX6012-21
VIN
200mV/div
VOUT
100mV/div
2.5µs/div
VIN = 5V ±0.25V, AC-COUPLED
MAX6012
LINE-TRANSIENT RESPONSE
MAX6012-24
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
Maxim Integrated
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Detailed Description
The MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/
MAX6045/MAX6050 precision bandgap references
use a proprietary curvature-correction circuit and laser-
trimmed thin-film resistors, resulting in a low temperature
coefficient of <20ppm/°C and initial accuracy of better
than 0.2%. These devices can sink and source up to
500μA with <200mV of dropout voltage, making them
attractive for use in low-voltage applications.
Applications Information
Output/Load Capacitance
Devices in this family do not require an output capaci-
tance for frequency stability. They are stable for capacitive
loads from 0 to 2.2nF. However, in applications where
the load or the supply can experience step changes, an
output capacitor will reduce the amount of overshoot (or
undershoot) and assist the circuit’s transient response.
Many applications do not need an external capacitor, and
this family can offer a significant advantage in these appli-
cations when board space is critical.
Supply Current
The quiescent supply current of these series-mode refer-
ences is a maximum of 35μA and is virtually independent
of the supply voltage, with only a 0.8μA/V variation with
supply voltage. Unlike series references, shunt-mode
references operate with a series resistor connected to the
power supply. The quiescent current of a shunt-mode ref-
erence is thus a function of the input voltage. Additionally,
shunt-mode references have to be biased at the maxi-
mum expected load current, even if the load current is not
present all the time. The load current is drawn from the
input voltage only when required, so supply current is not
wasted and efficiency is maximized at all input voltages.
This improved efficiency can help reduce power dissipa-
tion and extend battery life.
When the supply voltage is below the minimum specified
input voltage (as during turn-on), the devices can draw up
to 200μA beyond the nominal supply current. The input
voltage source must be capable of providing this current
to ensure reliable turn-on.
Output Voltage Hysteresis
Output voltage hysteresis is the change in the output volt-
age at TA = +25°C before and after the device is cycled
over its entire operating temperature range. Hysteresis is
caused by differential package stress appearing across
the bandgap core transistors. The typical temperature
hysteresis value is 130ppm.
Figure 1. Positive and Negative References from Single +3V or +5V Supply
Pin Description
PIN NAME FUNCTION
1 IN Supply Voltage Input
2OUT Reference Voltage Output
3GND Ground
IN
VS
+2VS
-2VS
OUT +REF OUTPUT
OUTPUT
-REF OUTPUT
10nF
1MΩ
0.1%
1MΩ
0.1%
GND
MAX6012
MAX6021
MAX6025
MAX6030
MAX6041
MAX6045
MAX6050
VCC V+
GND
MAX681
V-
V+
V-
ICL7652
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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Turn-On Time
These devices typically turn on and settle to within 0.1%
of their final value; 30μs to 220μs depending on the
device. The turn-on time can increase up to 1.5ms with
the device operating at the minimum dropout voltage and
the maximum load.
Positive and Negative Low-Power
Voltage Reference
Figure 1 shows a typical method for developing a bipolar
reference. The circuit uses a MAX681 voltage doubler/
inverter charge-pump converter to power an ICL7652, thus
creating a positive as well as a negative reference voltage.
Pin Conguration
OUT
1
3 GND
IN MAX6012
MAX6021
MAX6025
MAX6030
MAX6041
MAX6045
MAX6050
SOT23-3
TOP VIEW
2
Chip Information
TRANSISTOR COUNT: 70
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
www.maximintegrated.com Maxim Integrated
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Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX6012/6021/6025/
6030/6041/6045/6050
Precision, Low-Power, Low-Dropout,
SOT23-3 Voltage References
© 2001 Maxim Integrated Products, Inc.
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